Dockerizing a Node.js web application

Build the Node.js application

Firstly, create Dockerfile for the Node.js application.

FROM node:14.18.2-alpine3.14
WORKDIR /app
COPY package.json ./
COPY package-lock.json ./
COPY ./ ./
RUN npm ci
CMD ["npm", "run", "start"]

Since I've used node-sass package for enabling SASS in my application and the package supports limited Node.js version, I need to find the right node.js docker image at docker hub.

Supported Environments by node-sass package

At docker hub, search for the right image in the Tags tab. Once the desired image is found, put it on the first line (i.e. the FROM layer) of the Dockerfile.

Node.js docker images

Secondly, create .dockerignore file to exclude files and directories from the docker image.

node_modules
*.log

Thirdly, build the Node.js application.

yarn build

Fourthly, build the docker image.

*Make sure Docker Engine is running in your development environment.

docker build -f Dockerfile -t portfolio-website .

Deployment

Deploy by exposing port 5001 instead of default port 3000 (you can change to any port according to your environment).

docker run --name portfolio-website -it -p 5001:3000 portfolio-website

Verification

Check that the web application is running by opening http://localhost:5001/ in a web browser.

Dockerized Node.js application

Dockerizing a Node.js web application

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Build the Node.js application

Deployment

Verification

Command Palette

Comments

DevSecOps

CI with Snyk using GitHub Actions

More from this blog

Build the Node.js application

Deployment

Verification